若变量x,y满足约束条件$\left\{\begin{array}{c}x+y-3\le 0\\ x-y+1>0\\ y\ge 1\end{array}\begin{array}{c}\\ \end{array}\right.$，则z=2x-y的最大值为(   )

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    Bobby likes wearing hats. Hats make him feel cool. Hats1the sun out of his eyes. His favorite hat is a baseball hat.

    Last year, Bobby saved money every month to buy the baseball2 . After a few3 , he had enough money for the new hat. Although it4 him some months to buy one, he was excited.

    Bobby bought a new red hat because his favorite baseball team wore  5  hats. When he put on his new hat, he felt he was a part of the team. When Bobby's father saw the new hat, he was kind of6. He didn't think his son could save so much money.

    One day Bobby's father got two7tickets, so he planned to take his son to watch a baseball game. Bobby was very happy to wear his new red hat to the8. He was very excited to watch his favorite team. He thought he was one of them, 9 all the team wore the same red hats.

    His team won the game, and Bobby was very happy. The new hat was good and it10 his favorite team good luck. And it was really good to spend time with Dad.